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PM-HF Pressure or Vacuum Relief Valve

Brand: PROTEGO
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The Protego type PM-HF pilot-controlled diaphragm valve is a highly developed valve for pressure and vacuum relief. 

Primarily used as a safety device for outbreathing in tanks, vessels, and process engineering equipment it also offers reliable protection from vacuum and overpressure. 

It prevents intake of air and unacceptable product vapor loss up to and until the set-to-operate pressure is reached. 

The valve can be used as an in breathing device as well. In such an application, the main valve is directly controlled when exposed to a vacuum, i.e. it functions as a weight-loaded diaphragm valve.
Features
  • Controlled by corrosion-resistant pilot valve
  • Small amount fluid stored in the tank released into the atmosphere by the pilot when the valve opens
  • Maximum 10% technology for minimum pressure increase until full lift
  • Seals extremely tight; hence, least possible product losses and reduced impact on the environment
  • Set-to-operate pressure close to the opening pressure; hence, best possible pressure management of the system
  • Control diaphragm of the main valve shielded from low temperatures-long service life
  • High flow capacity
  • Suited for use in hazardous areas
  • Field-test-connection on request
  • Field-test-kit on request
The Protego type PM-HF pilot-controlled diaphragm valve is a highly developed valve for pressure and vacuum relief. 

Primarily used as a safety device for outbreathing in tanks, vessels, and process engineering equipment it also offers reliable protection from vacuum and overpressure. 

It prevents intake of air and unacceptable product vapor loss up to and until the set-to-operate pressure is reached. 

The valve can be used as an in breathing device as well. In such an application, the main valve is directly controlled when exposed to a vacuum, i.e. it functions as a weight-loaded diaphragm valve.
Features
  • Controlled by corrosion-resistant pilot valve
  • Small amount fluid stored in the tank released into the atmosphere by the pilot when the valve opens
  • Maximum 10% technology for minimum pressure increase until full lift
  • Seals extremely tight; hence, least possible product losses and reduced impact on the environment
  • Set-to-operate pressure close to the opening pressure; hence, best possible pressure management of the system
  • Control diaphragm of the main valve shielded from low temperatures-long service life
  • High flow capacity
  • Suited for use in hazardous areas
  • Field-test-connection on request
  • Field-test-kit on request
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Specifications

Brand

Approvals & Certifications

  • ISO 6358, ISO 16016
  • TÜV (Technischer Uberwachungsverein)

Diaphragm Material

  • Main Diaphragm Protection: Stainless Steel
  • Pilot: FEP

Enclosure, Body Material

  • Pilot: Aluminum
  • Pilot: Stainless Steel

Flange Size - 10” (DN 250)

  • 10” (DN 250) - 150# ASME B16.5

Flange Size - 12” (DN 300)

  • 12” (DN 300) - 150# ASME B16.5

Flange Size - 3” (DN 80)

  • 3” (DN 80) - 150# ASME B16.5

Flange Size - 4” (DN 100)

  • 4” (DN 100) - 150# ASME B16.5

Flange Size - 6” (DN 150)

  • 6” (DN 150) - 150# ASME B16.5

Flange Size - 8” (DN 200)

  • 8” (DN 200) - 150# ASME B16.5

Flange Type

  • Raised Face (RF)
  • Smooth Finish

Materials of Construction

  • Pilot Lines: Stainless Steel

Pressure Range

  • psi: -0.101 to -0.031 (kPa: -0.7 to -0.22, Mbar: -7 to -2.2) - Vacuum
  • psi: 0.145 to 15 (kPa: 1 to 103.4, Mbar: 10 to 1,034)

Seat / Seal Material

  • Seal: Klingersil C-4106
  • Valve Seat: Stainless Steel
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